Inspection And Verification

WARNING: This page is about a different variant/trim than selected.

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.

NOTE:

If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures information (B1.2), or determine if any prior approval programme is in operation, prior to the installation of a new module/component.
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

Verify the customer concern.

Visually inspect for obvious signs of mechanical or electrical damage.

VISUAL INSPECTION

Mechanical	Electrical
Check for stuck/jammed switches and buttons Visibly damaged or worn components Transmission Control Switch (TCS)	Fuse(s) Loose or corroded electrical connector(s) Transmission Control Switch (TCS) Controller Area Network (CAN)

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.